Determination of Ideal Spacing for the Growth and Development of Boro Rice BRRI Dhan47

A study was carried out in the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh, Bangladesh to investigate the impact of spacing on the growth and yield of Boro rice cv. BRRI Dhan47. The experiment consisted of four spacings viz. 25 cm × 10 cm, 25 cm × 15 cm, 25 cm × 20 cm and 25 cm × 25 cm as treatment. The experiment was laid out in a randomized complete block design with three replications. Spacing significantly influenced most of the parameters except plant height, panicle length and weight of 1000 grain. The highest number of total tillers hill-1, non-effective tillers hill-1, sterile spikelets panicle-1, total spikelets panicle-1 (146.07) and straw yield were obtained from 25 cm × 25 cm spacing. But, the maximum number of effective tillers hill-1, grains panicle-1 (125.40), grain yield (5.05 t ha-1), biological yield (11.22 t ha-1) and harvest index (44.86%) were recorded from 25 cm × 15 cm spacing. The lowest value of the above-mentioned characters was obtained from 25 cm × 10 cm spacing in most of the cases except minimum non-effective tillers hill-1 and number of sterile spikelets panicle were obtained from 25 cm × 15 cm spacing and the lowest harvest index (41.14%) was recorded from 25 cm × 25 cm spacing. Based on the findings of the study, it can be suggested that the use of 25 cm × 15 cm spacing would be a promising practice to improve growth and maximize the grain yield of BRRI dhan47.